<track id="pzjkf"></track>

      <track id="pzjkf"></track>
      <tbody id="pzjkf"></tbody>
      Share
      Print
      A+
      A-

      Algae, beautiful yet dangerous

      Writer: Matteo Convertino  |  Editor: Zhang Chanwen  |  From: Shenzhen Daily  |  Updated: 2023-11-02

      The Shenzhen Bay in Nanshan District is highly eutrophic and recently, a thick patchy algae bloom was discovered in Talent Park. This bloom covered most water bodies, and investigations are under way to trace its causes and find solutions. The bloom was likely caused by a combination of extreme drought conditions, hyper-salinity due to poor tidal exchange, and high nutrient inflow from a humanmade freshwater canal.

      位于南山區的深圳灣是一個富營養化嚴重的海灣,近期,在人才公園發現了成片而厚實的赤潮,這片赤潮覆蓋了大部分水域。目前調查正在進行以追蹤其原因并找到解決方法。本次赤潮的產生與極端的干旱條件、潛在不良的潮汐交換導致的高鹽度水體,及可能來自人工淡水運河的高營養物質有關。

      A thick patchy algae bloom was discovered in Talent Park recently. Matteo Convertino

      近期,在人才公園發現了成片而厚實的赤潮。

      Tracking microalgae is crucial to detect whether water bodies have exceeded risk thresholds, whether the algae is blooming, or worse, if the water contains toxic pathogens associated with the emergence of blooms. After analyzing the algae in Talent Park, which consisted mostly of chlorellas, diatoms, and leptolyngbya (a cyanobacteria species), no apparent signs of toxicity were found. However, there were observations of dead birds and fish and high nitrogen and phosphorus levels. Therefore, it is highly recommended not to touch the water due to the potential for skin irritation and toxicity.

      追蹤微藻對于檢測水體是否超過風險閾值、赤潮是否會爆發,或者水體是否含有與赤潮發生有關的有害病原體至關重要。在分析了人才公園的赤潮后,發現其主要由小球藻、硅藻和細鞘絲藻(一種藍藻物種)組成,雖然沒有發現明顯的毒性跡象,卻伴隨有鳥和魚的死亡,以及水體高氮和高磷水平的情況。這有可能造成人類皮膚刺激和中毒情況,因此強烈建議不要接觸發生赤潮時的海水。

      Algae blooms can be seen near Talent Park's bridge where there is lighting at night. Photo by Bowen 

      人才公園橋的附近可以看到赤潮現象,光線有可能促進了藻類進行光合作用的生長。

      Multispectral drones can be used to trace blooms and define red areas that are active and potentially more risky. Red pixels identify locations where oxygen levels are potentially very low, which harms biodiversity. These active blooms coincide with areas close to night illumination such as those close to Talent Park's bridge. The light may have contributed to the growth of photosynthetic algaes.

      多光譜無人機可以用來追蹤赤潮,并定義藻類活躍、有更大的風險爆發赤潮的紅色區域。紅色像素標識出不利于生物生存的氧氣水平非常低的位置。此次赤潮發生區域與靠近夜間照明的區域相重疊,如人才公園橋的附近,這表明光線有可能促進了藻類進行光合作用的生長。

      Algal blooms of dinoflagellates were observed recently in the Dapeng peninsula. Courtesy of Shenzhen Marine Environmental Monitoring Center.

      近期,在大鵬半島可以觀察到鞭毛藻爆發現象。

      Recently, other colorful but harmful algal blooms of dinoflagellates were observed in the Dapeng peninsula: red algae during the day and neon-blue bioluminescent at night. Although these blooms have bright colors and artsy patterns, they can be potentially harmful.

      最近,在大鵬半島也觀察到其他五顏六色但有害的鞭毛藻爆發現象:白天看起來是紅藻,晚上看到的則是霓虹藍的生物發光體。雖然這些藻類有明亮的顏色和藝術性的圖案,但它們可能是有潛在危害的。

      Eutrophication, which results from excessive nutrients, can be caused by dramatic shifts in nutrients, fresh and salt-water flows, sediment, biodiversity, and temperatures. The growth of algae is often a complex combination of slow and fast changes acting together that lead to eutrophication. When this becomes frequent and persistent, it can alter ecosystems, result in carbon emissions, species death, poor water quality, and emerging pathogenic toxins that can severely harm local species as well as people.

      富營養化是由過多的營養物質造成的,該現象可以由營養物質、淡水和鹽水流量、沉積物、生物多樣性和溫度的劇烈變化引起。藻類的生長往往是緩慢和快速變化共同作用的復雜過程,最終導致富營養化。當這種情況變得頻繁且長久時就會改變生態系統,導致碳的排放、物種死亡、水質變差以及出現病原體毒素等現象,從而嚴重危害當地物種以及人類生活。

      Park staff members remove algaes from the seawater in Talent Park in Nanshan District recently. Matteo Convertino

      人才公園的管理人員在打撈藻類。

      Balanced freshwater-saltwater flows, habitat connections, water treatment, protection and restoration of coastal vegetation, fish and other wildlife, ecosystem monitoring, and responsible recreation are necessary solutions to maintain a well-functioning biodiversity in which species support each other. Prevention is crucial, and everyone should join efforts to build better aquatic ecosystems.

      平衡的淡水-海水流動、生境的連通性、污水處理、保護和恢復沿海植被、魚類和其他野生動物、生態系統監測和游客負責任的娛樂活動等,是維持功能良好且互相支持的生物多樣性所需要的方案。保護生物多樣性預防是至關重要的,每個人都應該為建設更好的水生生態系統而努力。


      亚洲欧美v国产蜜芽tv-bbox撕裂bass孕妇公交车-bl含着按摩器体育课跑步-97精品伊人久久大香线蕉-校草太大了(h)-双腿打开绑在刑床惩罚男男双性
      <track id="pzjkf"></track>

        <track id="pzjkf"></track>
        <tbody id="pzjkf"></tbody>